/nooh"kas'euhl, -kah'seuhl, nyooh"-/ , n.
1. 1st Duke of . See Pelham-Holles, Thomas .
2. Also called Newcastle-upon-Tyne /nooh"kas'euhl euh pon'tuyn", -euh pawn'-, -kah'seuhl-, nyooh"-/ . a seaport in Tyne and Wear, in NE England, on the Tyne River: shipbuilding; major coal center. 295,700.
3. a seaport in E New South Wales, in SE Australia. 146,900.
4. a town in SE Ontario, in S Canada, NE of Toronto, on Lake Ontario. 32,229.
5. carry coals to Newcastle ,
a. to take something to a place where its kind exists in great quantity.
b. to do something wholly unnecessary.